I bought the lights to 10 conventional halogen bulbs with 5 X 20 watts into 2 cable systems to ersetzen.Die luminous efficiency is slightly lower than the halogen lamps, but perfectly adequate. The light color of LED light in order. Is not quite as warm white like conventional lamps but did not you this laboratory atmosphere, as has been often in LED lamps. And in a power savings of approximately 80% for this price really reasonable.
